(57) A venetian-blind type of photomultiplier tube comprising a photocathode (3) for converting
incident light into photoelectrons, a venetian-blind type of dynode array (5) comprising
a plurality of dynode rows (5₁,5₂,...5n) arranged one after the other in a first direction, each row comprising a plurality
of dynode elements (7) arranged at a constant pitch in a second direction, transverse
to the first direction, and each dynode element (7) having the form of a plate inclined
to the first direction. The photomultiplier tube also includes an anode array (6)
comprising plural anodes arranged in the second direction for collecting the secondary
electrons emitted from the dynode array (5) and for outputting an amplified electrical
signal corresponding to the incident light, and one or more electron focusing electrodes
(8) for converging at least one stream of the photoelectrons and the secondary electrons
and concentrically directing the converged stream to a predetermined portion of their
respective dynode elements. The electron-flight control member (8) may have the form
of a grid, strip, mesh and/or multi-aperture structure.
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